CN106875098A - A kind of electrically-charging equipment is to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating - Google Patents
A kind of electrically-charging equipment is to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating Download PDFInfo
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Abstract
The present invention proposes a kind of electrically-charging equipment to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating, mainly solves the current electrically-charging equipment that lacks to electrokinetic cell security incident pre-alerting ability quantization method.The method step：1) electrokinetic cell security incident type is determined；2) electrically-charging equipment pre-alerting ability is tested, test data is obtained；3) weight calculation from the aspect of subjective and objective two, three layers of appraisement system row matrix of going forward side by side is built using analytic hierarchy process (AHP) and is calculated subjectivity weight, using test data Objective Weight in Mult-Purpose is calculated through formula, the combining weights of subjectivity and Objective Weight in Mult-Purpose are calculated based on dispersion method, comprehensive weight is finally given；4) it is calculated electrokinetic cell accident early warning overall target using test data and comprehensive weight --- early warning rate.The appraisement system quantifies pre-alerting ability, improves the quality of vendor product, avoids cell safety accident to occur since the capital construction initial stage.
Description
Technical field
The present invention relates to a kind of pre-alerting ability method for quantitatively evaluating, mainly for electrically-charging equipment to electrokinetic cell security incident
Early warning.
Background technology
Power battery charging is mainly made up of safely safely electrically-charging equipment safety and electrokinetic cell, wherein had much grinding
Study carefully personnel and focus on electrokinetic cell security fields, it is exactly to improve battery to security incident to improve one of method of electrokinetic cell safety
Pre-alerting ability, existing method be by increase BMS (Battery Management System, battery management system) survey
The battery status parameter quantity of amount improves battery status parameter measuring method, improves the recognition capability to battery status, enters
And improve the pre-alerting ability to battery failures.It is that description improves pre-alerting ability in existing document, specifically improves how many
Degree, the clear and definite index of neither one goes to weigh.The present invention proposes a kind of electrokinetic cell security incident pre-alerting ability quantitatively evaluating
Method, and provide final evaluation index.
Proposing the purpose of the evaluation method and evaluation index is, to battery management system and its upper strata charging control unit
Pre-alerting ability is quantified, and promotes battery management system manufacturer and the concern battery failures early warning of electrically-charging equipment manufacturing enterprise to lead
Domain, and the monitoring capacity to battery status is improved in terms of hardware and software two, go to avoid cell safety thing with best endeavors
Therefore generation.
The content of the invention
The present invention provides a kind of electrically-charging equipment to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating, for quantifying
Electrokinetic cell security incident pre-alerting ability.
Electrokinetic cell security incident pre-alerting ability evaluation procedure is as follows：
1) electrokinetic cell security incident type is determined, the present invention is with internal short-circuit, external short circuit, high temperature, high voltage, big electricity
Stream, overcharge, high humidity, voltage x current ripple is excessive, and voltage x current rate of change is excessive, discharges gas, communication abnormality, error-polarity connection
As a example by Deng 15 security incidents, for calculating comprehensive evaluation index, but these are not limited to.
2) test electrically-charging equipment obtains the test number of every kind of security incident to all security incident pre-alerting abilities of electrokinetic cell
According to --- early warning rate of the electrically-charging equipment to the every kind of security incident of electrokinetic cell in charging process.
3) weight calculation from the aspect of subjective and objective two, builds three layers of appraisement system and goes forward side by side using analytic hierarchy process (AHP)
Row matrix is calculated subjectivity weight, and Objective Weight in Mult-Purpose is calculated through formula using test data, based on dispersion method
The combining weights of subjectivity and Objective Weight in Mult-Purpose are calculated, comprehensive weight is finally given.
4) comprehensive evaluation index is drawn using test data and comprehensive weight --- early warning rate.
The step 2) be：
In battery charging process, respectively for all security incidents of electrokinetic cell, it is set in m experiment of regulation
Middle n experiment is tested for security incident, and in security incident experiment, electrically-charging equipment is capable of identify that security incident correspondence parameter value surpasses
Parameter correspondence threshold value is crossed, and sends early warning signal, referred to as one time early warning success of the test, otherwise referred to as one time early warning experiment is lost
Lose；In normal assays, electrically-charging equipment is capable of identify that security incident correspondence parameter value, no more than parameter correspondence threshold value, is not sent out
Go out early warning signal, referred to as one time normal assays success, otherwise referred to as one time normal assays failure；Early warning tests number of times successfully with peace
The ratio of full accident test number (TN), referred to as the security incident early warning success rate, are designated as PSi；Normal the failure of an experiment number of times and normal reality
The ratio of number of times is tested, referred to as the normal assays miss early warning rate, are designated as PFi；The security incident early warning rate calculation expression is shown in formula (1).
In formula (1), PiIt is the security incident early warning rate；PSiIt is the security incident early warning success rate；PFiIt is the normal assays
Miss early warning rate；N is security incident test number (TN)；M is the experiment total degree of regulation.
Wherein, the threshold value determination method is divided to from the aspect of two, one is average with maximum using rated value
Value, the second is being modified within the specific limits by battery manufacturer on the basis of average value.In practical operation, average value is not
Must be optimal early warning value, be various with battery information Parameters variation cell performance curve, it is therefore desirable to battery manufacturer
Intervention, small range modification is carried out according to battery real measured data to threshold value.
The step 3) be：
(1) subjectivity weight is calculated based on analytic hierarchy process (AHP)
Set up three layers of appraisement system：Destination layer is evaluated for electrokinetic cell security incident pre-alerting ability；Rule layer is power electric
Pond security incident type, comprising internal short-circuit, external short circuit, high temperature, high voltage, high current, overcharge, high humidity, voltage x current
Ripple is excessive, and voltage x current rate of change is excessive, discharges gas, communication abnormality, error-polarity connection etc. 15, and factor layer is electrokinetic cell
Parameter, comprising voltage, electric current, SOC, temperature, internal resistance, communication, humidity, gas etc. 8.Using 1~9 scale, with reference to other
The scale value of combustible, gives a mark by expert system, constructs judgment matrix.The characteristic value of the judgment matrix is solved, is utilized
Its eigenvalue of maximum carries out consistency desired result, is calculated consistency ration CR, if CR<0.1, just meet analytic hierarchy process (AHP) pair
The requirement of judgment matrix.Analytic hierarchy process (AHP) weight vector computation method mainly has geometric average method, arithmetic mean method, feature vector method
With 4 kinds of least square method, calculated by one of which method, then be normalized, obtain subjectivity weight vectors.
(2) Objective Weight in Mult-Purpose is calculated based on test data
Objective Weight in Mult-Purpose computing formula for i-th electrokinetic cell security incident is：
In formula (2), PiIt is i-th security incident type test data, viIt is the i-th objectivity power of security incident type
Weight, n is security incident number of types.Weight v is mainly used in embodying data less than normal in test data, highlights pre-alerting ability
Weakness, similar to the short -board effect of Law of Barrel.
(3) comprehensive weight is calculated based on dispersion method
Using standard deviation calculate weight formula be
In formula (3), i is 1 or 2, mainly for distinguishing two weight vectors, σ1It is the standard of subjectivity weight vectors u
Difference, σ2It is the standard deviation of Objective Weight in Mult-Purpose vector v.Comprehensive weight computing formula is
W=w1·u+w2·v (4)
In formula (4), w is comprehensive weight vector, and u is the subjectivity weight vectors based on analytic hierarchy process (AHP), and v is based on experiment
The Objective Weight in Mult-Purpose vector of data, w1It is proportions of the u in comprehensive weight w, w2It is proportions of the v in comprehensive weight w.
The step 4) be：
The all security incident early warning rates of electrokinetic cell and the respective weights sum of products, referred to as electrically-charging equipment pair in charging process
The early warning rate of electrokinetic cell security incident in charging process, expression formula is shown in formula (5).
In formula (5), P is electrokinetic cell security incident early warning rate；PiIt is i-th security incident early warning rate；wiIt is i-th peace
The corresponding weight of full accident.
The proposition of evaluation method and overall target in the present invention, is pre- to electrokinetic cell security incident to quantify electrically-charging equipment
Alert ability, what should be reached from qualitative judgement to rational judgment, clearer and more definite electrically-charging equipment and battery management system production firm is pre-
Alert ability level, effort goes to avoid cell safety accident from occurring in terms of electrically-charging equipment construction.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
A kind of embodiment of invention, for those skilled in the art, without having to pay creative labor, can be with root
Other accompanying drawings are obtained according to accompanying drawing.
Accompanying drawing 1 is the three layers of schematic diagram of appraisement system set up based on analytic hierarchy process (AHP).
Shown in components listed is listed as follows in accompanying drawing：
A：Destination layer
A1：Electrokinetic cell security incident pre-alerting ability is evaluated
B：Rule layer
B01：External short circuit B02：Internal short-circuit
B03：High temperature B04：Low temperature
B05：High voltage B06：Low-voltage
B07：High current B08：Overcharge
B09：High humidity B10：Voltage ripple is excessive
B11：The excessive B12 of current ripples：Voltage x current rate of change is excessive
B13：Release gas B14：Communication abnormality
B15：Error-polarity connection
C：Factor layer
C1：Voltage C2：Electric current
C3：SOC C4：Temperature
C5：Internal resistance C6：Communication
C7：Humidity C8：Temperature
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Electrokinetic cell security incident pre-alerting ability evaluation procedure is as follows：
1) electrokinetic cell security incident type is determined, the present invention is with internal short-circuit, external short circuit, high temperature, high voltage, big electricity
Stream, overcharge, high humidity, voltage x current ripple is excessive, and voltage x current rate of change is excessive, discharges gas, communication abnormality, error-polarity connection
As a example by Deng 15 security incidents, for calculating comprehensive evaluation index, but these are not limited to.
2) test electrically-charging equipment obtains the test number of every kind of security incident to all security incident pre-alerting abilities of electrokinetic cell
According to --- early warning rate of the electrically-charging equipment to the every kind of security incident of electrokinetic cell in charging process.
3) weight calculation from the aspect of subjective and objective two, builds three layers of appraisement system and goes forward side by side using analytic hierarchy process (AHP)
Row matrix is calculated subjectivity weight, and Objective Weight in Mult-Purpose is calculated through formula using test data, based on dispersion method
The combining weights of subjectivity and Objective Weight in Mult-Purpose are calculated, comprehensive weight is finally given.
4) comprehensive evaluation index is drawn using test data and comprehensive weight --- early warning rate.
The step 2) be：
In battery charging process, respectively for all security incidents of electrokinetic cell, it is set in m experiment of regulation
Middle n experiment is tested for security incident, and in security incident experiment, electrically-charging equipment is capable of identify that security incident correspondence parameter value surpasses
Parameter correspondence threshold value is crossed, and sends early warning signal, referred to as one time early warning success of the test, otherwise referred to as one time early warning experiment is lost
Lose；In normal assays, electrically-charging equipment is capable of identify that security incident correspondence parameter value, no more than parameter correspondence threshold value, is not sent out
Go out early warning signal, referred to as one time normal assays success, otherwise referred to as one time normal assays failure；Early warning tests number of times successfully with peace
The ratio of full accident test number (TN), referred to as the security incident early warning success rate, are designated as PSi；Normal the failure of an experiment number of times and normal reality
The ratio of number of times is tested, referred to as the normal assays miss early warning rate, are designated as PFi；The security incident early warning rate calculation expression is shown in formula (1).
In formula (1), PiIt is the security incident early warning rate；PSiIt is the security incident early warning success rate；PFiIt is the normal assays
Miss early warning rate；N is security incident test number (TN)；M is the experiment total degree of regulation.
Wherein, the threshold value determination method is divided to from the aspect of two, one is average with maximum using rated value
Value, the second is being modified within the specific limits by battery manufacturer on the basis of average value.In practical operation, average value is not
Must be optimal early warning value, be various with battery information Parameters variation cell performance curve, it is therefore desirable to battery manufacturer
Intervention, small range modification is carried out according to battery real measured data to threshold value.
The step 3) be：
(1) subjectivity weight is calculated based on analytic hierarchy process (AHP)
Set up three layers of appraisement system：Destination layer is evaluated for electrokinetic cell security incident pre-alerting ability；Rule layer is power electric
Pond security incident type, comprising internal short-circuit, external short circuit, high temperature, high voltage, high current, overcharge, high humidity, voltage x current
Ripple is excessive, and voltage x current rate of change is excessive, discharges gas, communication abnormality, error-polarity connection etc. 15, and factor layer is electrokinetic cell
Parameter, comprising voltage, electric current, SOC, temperature, internal resistance, communication, humidity, gas etc. 8, see accompanying drawing 1.Using 1~9 scale,
With reference to the scale value of other combustibles, given a mark by expert system, construct judgment matrix.Solve the feature of the judgment matrix
Value, consistency desired result is carried out using its eigenvalue of maximum, consistency ration CR is calculated, if CR<0.1, just meet level
Requirement of the analytic approach to judgment matrix.Analytic hierarchy process (AHP) weight vector computation method mainly has geometric average method, arithmetic mean method, spy
4 kinds of vector method and least square method are levied, is calculated by one of which method, then be normalized, obtain subjectivity weight
Vector.
(2) Objective Weight in Mult-Purpose is calculated based on test data
Objective Weight in Mult-Purpose computing formula for i-th electrokinetic cell security incident is：
In formula (2), PiIt is i-th security incident type test data, viIt is the i-th objectivity power of security incident type
Weight, n is security incident number of types.Weight v is mainly used in embodying data less than normal in test data, highlights pre-alerting ability
Weakness, similar to the short -board effect of Law of Barrel.
(3) comprehensive weight is calculated based on dispersion method
Using standard deviation calculate weight formula be
In formula (3), i is 1 or 2, mainly for distinguishing two weight vectors, σ1It is the standard of subjectivity weight vectors u
Difference, σ2It is the standard deviation of Objective Weight in Mult-Purpose vector v.Comprehensive weight computing formula is
W=w1·u+w2·v (4)
In formula (4), w is comprehensive weight vector, and u is the subjectivity weight vectors based on analytic hierarchy process (AHP), and v is based on experiment
The Objective Weight in Mult-Purpose vector of data, w1It is proportions of the u in comprehensive weight w, w2It is proportions of the v in comprehensive weight w.
The step 4) be：
The all security incident early warning rates of electrokinetic cell and the respective weights sum of products, referred to as electrically-charging equipment pair in charging process
The early warning rate of electrokinetic cell security incident in charging process, expression formula is shown in formula (5).
In formula (5), P is electrokinetic cell security incident early warning rate；PiIt is i-th security incident early warning rate；wiIt is i-th peace
The corresponding weight of full accident.
The proposition of evaluation method and overall target in the present invention, is pre- to electrokinetic cell security incident to quantify electrically-charging equipment
Alert ability, what should be reached from qualitative judgement to rational judgment, clearer and more definite electrically-charging equipment and battery management system production firm is pre-
Alert ability level, effort goes to avoid cell safety accident from occurring in terms of electrically-charging equipment construction.
Claims (4)
1. a kind of electrically-charging equipment is to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating, it is characterised in that its step is such as
Under：
1) determine electrokinetic cell security incident type, the present invention with internal short-circuit, external short circuit, high temperature, high voltage, high current,
Overcharge, high humidity, voltage x current ripple is excessive, and voltage x current rate of change is excessive, discharges gas, communication abnormality, error-polarity connection etc.
As a example by 15 security incidents, for calculating comprehensive evaluation index, but these are not limited to.
2) test electrically-charging equipment obtains the test number of every kind of security incident to all security incident pre-alerting abilities of electrokinetic cell
According to --- early warning rate of the electrically-charging equipment to the every kind of security incident of electrokinetic cell in charging process.
3) weight calculation from the aspect of subjective and objective two, builds three layers of appraisement system and carries out square using analytic hierarchy process (AHP)
Battle array is calculated subjectivity weight, and Objective Weight in Mult-Purpose is calculated through formula using test data, is calculated based on dispersion method
The combining weights of subjectivity and Objective Weight in Mult-Purpose, finally give comprehensive weight.
4) comprehensive evaluation index is drawn using test data and comprehensive weight --- early warning rate.
2. a kind of electrically-charging equipment according to claim 1 is to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating,
It is characterized in that described step 2) be：
In battery charging process, respectively for all security incidents of electrokinetic cell, wherein n is set in m experiment of regulation
Secondary experiment is tested for security incident, and in security incident experiment, electrically-charging equipment is capable of identify that security incident correspondence parameter value exceedes
Parameter correspondence threshold value, and early warning signal is sent, referred to as one time early warning success of the test, otherwise referred to as one time early warning test failure；
In normal assays, electrically-charging equipment is capable of identify that security incident correspondence parameter value, no more than parameter correspondence threshold value, does not send
Early warning signal, referred to as one time normal assays success, otherwise referred to as one time normal assays failure；Early warning tests number of times and safety successfully
The ratio of accident test number (TN), referred to as the security incident early warning success rate, are designated as PSi；Normal the failure of an experiment number of times and normal experiment
The ratio of number of times, the referred to as normal assays miss early warning rate, are designated as PFi；The security incident early warning rate calculation expression is shown in formula (1).
In formula (1), PiIt is the security incident early warning rate；PSiIt is the security incident early warning success rate；PFiFor the normal assays are by mistake pre-
Alert rate；N is security incident test number (TN)；M is the experiment total degree of regulation.
Wherein, the threshold value determination method is divided to from the aspect of two, one is using rated value and the average value of maximum, its
Two are modified within the specific limits by battery manufacturer on the basis of average value.In practical operation, average value is not necessarily
It is optimal early warning value, is various with battery information Parameters variation cell performance curve, it is therefore desirable to which battery manufacturer intervenes,
Small range modification is carried out to threshold value according to battery real measured data.
3. a kind of electrically-charging equipment according to claim 1 is to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating,
It is characterized in that described step 3) be：
(1) subjectivity weight is calculated based on analytic hierarchy process (AHP)
Set up three layers of appraisement system：Destination layer is evaluated for electrokinetic cell security incident pre-alerting ability；Rule layer is pacified for electrokinetic cell
Full accident pattern, comprising internal short-circuit, external short circuit, high temperature, high voltage, high current, overcharge, high humidity, voltage x current ripple
Excessive, voltage x current rate of change is excessive, discharges gas, communication abnormality, error-polarity connection etc. 15, and factor layer is the ginseng of electrokinetic cell
Number, comprising voltage, electric current, SOC, temperature, internal resistance, communication, humidity, gas etc. 8.It is flammable with reference to other using 1~9 scale
The scale value of thing, gives a mark by expert system, constructs judgment matrix.The characteristic value of the judgment matrix is solved, using it most
Big characteristic value carries out consistency desired result, consistency ration CR is calculated, if CR<0.1, analytic hierarchy process (AHP) is just met to judging
The requirement of matrix.Analytic hierarchy process (AHP) weight vector computation method mainly has geometric average method, arithmetic mean method, feature vector method and most
4 kinds of small square law, is calculated by one of which method, then is normalized, and obtains subjectivity weight vectors.
(2) Objective Weight in Mult-Purpose is calculated based on test data
Test data herein refers to pre-alerting ability index of the electrically-charging equipment to certain electrokinetic cell security incident, limits
Between 0~1.Objective Weight in Mult-Purpose computing formula for i-th electrokinetic cell security incident is：
In formula (1), PiIt is i-th security incident type test data, hereinafter referred to as certain security incident early warning rate, viIt is
The i Objective Weight in Mult-Purpose of security incident type, n is security incident number of types.Weight v be mainly used in embody test data in partially
Small data, highlight the weakness of pre-alerting ability, similar to the short -board effect of Law of Barrel.
(3) comprehensive weight is calculated based on dispersion method
Using standard deviation calculate weight formula be
In formula (2), i is 1 or 2, mainly for distinguishing two weight vectors, σ1It is the standard deviation of subjectivity weight vectors u, σ2
It is the standard deviation of Objective Weight in Mult-Purpose vector v.Comprehensive weight computing formula is
W=w1·u+w2·v (3)
In formula (3), w is comprehensive weight vector, and u is the subjectivity weight vectors based on analytic hierarchy process (AHP), and v is based on test data
Objective Weight in Mult-Purpose vector, w1It is proportions of the u in comprehensive weight w, w2It is proportions of the v in comprehensive weight w.
4. a kind of electrically-charging equipment according to claim 1 is to electrokinetic cell security incident pre-alerting ability method for quantitatively evaluating,
It is characterized in that described step 4) be：
The all security incident early warning rates of electrokinetic cell and the respective weights sum of products in charging process, referred to as electrically-charging equipment is to charging
During electrokinetic cell security incident early warning rate, expression formula is shown in formula (5).
In formula (5), P is electrokinetic cell security incident early warning rate；PiIt is i-th security incident early warning rate；wiIt is i-th safe thing
Therefore corresponding weight.
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| CN109472516A (en) * | 2018-11-27 | 2019-03-15 | 广州中国科学院工业技术研究院 | Electrokinetic cell system fire risk detection method, device and computer equipment |
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Application publication date: 20170620 |